Studies on chemical constituents from Psychotria straminea The Ecological Comparison of Psychotria rubra and Rhodomytrus tomentosa in South China PHOTOSYNTHETIC RESPONSES OF TWO SUBTROPICAL WOODY PLANTS GROWING UNDER SUN AND SHADE ENVI RONMENTS RESPONSES OF PHOTOSYNTHESIS ON WATER STRESS FOR SHRUBS FROM TROPICAL RAIN FOREST AND SUBTROPICAL MONSOON FOREST Materials for Chinese Psychotria Linn.(Rubiaceae)